Measurement device for determining angular position

Abstract

A measurement device for determining an angular position, having a magnet device and a sensor device that are rotatable relative to one another. The magnet device has a first north pole face of a first magnetic north pole and a first south pole face of a first magnetic south pole. The magnet device has a second north pole face of a second magnetic north pole and a second south pole face of a second magnetic south pole. The sensor device is located in a region between the first north pole face and the first south pole face and between the second north pole face and the second south pole face. The sensor device has a first magnetic field sensor and a second magnetic field sensor. The first magnetic field sensor and the second magnetic field sensor are spaced apart from one another for ascertaining a magnetic field difference.

What is claimed is: 
     
       1. A measurement device for determining an angular position, the measurement device comprising:
 a magnet device; and 
 a sensor device, the magnet device and the sensor device being arranged rotatable relative to one another, 
 wherein the magnet device has a first north pole face of a first magnetic north pole and a first south pole face of a first magnetic south pole, the first north pole face and the first south pole face being substantially perpendicular to a spatial direction, 
 wherein the magnet device has a second north pole face of a second magnetic north pole and a second south pole face of a second magnetic south pole, the second north pole face and the second south pole face being substantially perpendicular to the spatial direction, 
 wherein a first magnetic field between the first north pole face and the first south pole face is oriented opposite to a second magnetic field between the second north pole face and the second south pole face, 
 wherein the sensor device is located in a region between the first north pole face and the first south pole face and between the second north pole face and the second south pole face, 
 wherein the sensor device has a first magnetic field sensor that is sensitive in the spatial direction, 
 wherein the sensor device has a second magnetic field sensor that is sensitive in the spatial direction, 
 wherein the first magnetic field sensor and the second magnetic field sensor are spaced apart from one another for ascertaining a magnetic field difference, 
 wherein the first magnetic field between the first north pole face and the first south pole face is oriented in a first field direction opposite to a second field direction of the second magnetic field between the second north pole face and the second south pole face, 
 wherein the first field direction and the second field direction are substantially parallel, and 
 wherein the first field direction and the second field direction are substantially parallel to the spatial direction. 
 
     
     
       2. The measurement device according to  claim 1 , wherein the first north pole face and the second south pole face are associated with a first magnet, and wherein the second north pole face and the first south pole face are associated with a second magnet. 
     
     
       3. The measurement device according to  claim 1 , wherein the first north pole face and the first south pole face are associated with a first magnet, and wherein the second north pole face and the second south pole face are associated with a second magnet. 
     
     
       4. The measurement according to  claim 1 , wherein the first north pole face is associated with a first magnet, wherein the first south pole face is associated with a second magnet, wherein the second north pole face is associated with a third magnet, and wherein the second south pole face is associated with a fourth magnet. 
     
     
       5. The measurement device according to  claim 1 , wherein the first north pole face and the second south pole face lie in a plane, or wherein the second north pole face and the first south pole face lie in a plane. 
     
     
       6. The measurement device according to  claim 1 , wherein the sensor device has a third magnetic field sensor sensitive in the spatial direction, wherein the sensor device has a fourth magnetic field sensor sensitive in the spatial direction, wherein the third magnetic field sensor and the fourth magnetic field sensor are spaced apart from one another for ascertaining a magnetic field difference, and wherein the third magnetic field sensor and the fourth magnetic field sensor are spaced apart from the first magnetic field sensor and the second magnetic field sensor. 
     
     
       7. The measurement device according to  claim 6 , wherein the first magnetic field sensor and the second magnetic field sensor and/or the third magnetic field sensor and the fourth magnetic field sensor are integrated into a semiconductor chip. 
     
     
       8. The measurement device according to  claim 1 , wherein the first north pole face of the first magnetic north pole and the second south pole face of the second magnetic south pole are on a first magnet having a first extension direction,
 wherein the second north pole face of the second magnetic north pole and the first south pole face of the first magnetic south pole are on a second magnet having a second extension direction substantially parallel to the first extension direction, and 
 wherein the first magnet and the second magnet are spaced apart forming a gap which accommodates the sensor device. 
 
     
     
       9. The measurement device according to  claim 8 , wherein the first magnetic field and the second magnetic field flow across the gap and through the sensor device. 
     
     
       10. The measurement device according to  claim 8 , wherein the first magnetic field sensor and the second magnetic field sensor are spaced apart substantially parallel to the first extension direction and the second extension direction. 
     
     
       11. The measurement device according to  claim 1 , wherein the first magnetic field sensor and the second magnetic field sensor are spaced apart substantially parallel to the first north pole face, the second north pole face, the first south pole face and the second south pole face. 
     
     
       12. A measurement device for determining an angular position, the measurement device comprising:
 a magnet device; and 
 a sensor device, the magnet device and the sensor device being arranged rotatable relative to one another, 
 wherein the magnet device has a first north pole face of a first magnetic north pole and a first south pole face of a first magnetic south pole, the first north pole face and the first south pole face being substantially perpendicular to a spatial direction, 
 wherein the magnet device has a second north pole face of a second magnetic north pole and a second south pole face of a second magnetic south pole, the second north pole face and the second south pole face being substantially perpendicular to the spatial direction, 
 wherein a first magnetic field between the first north pole face and the first south pole face is oriented opposite to a second magnetic field between the second north pole face and the second south pole face, 
 wherein the sensor device is located in a region between the first north pole face and the first south pole face and between the second north pole face and the second south pole face, 
 wherein the sensor device has a first magnetic field sensor that is sensitive perpendicular to the spatial direction, 
 wherein the sensor device has a second magnetic field sensor that is sensitive perpendicular to the spatial direction, 
 wherein the first magnetic field sensor and the second magnetic field sensor are spaced apart from one another in the spatial direction for ascertaining a magnetic field difference, 
 wherein the first magnetic field between the first north pole face and the first south pole face is oriented in a first field direction opposite to a second field direction of the second magnetic field between the second north pole face and the second south pole face, 
 wherein the first field direction and the second field direction are substantially parallel, and 
 wherein the first field direction and the second field direction are substantially parallel to the spatial direction.